100% Free

No Scanner Needed

Carly logo
Prices

jannikschmidt21

LFA cold start injector issue

My 2011 Lexus LFA, gasoline engine, exhibits poor engine running during the cold start phase and starts poorly. Mileage is 95046 km. Suspect a faulty cold start injector. Any diagnostic insights?

Summary of the thread

A 2011 Lexus LFA with 95,046 km is experiencing poor engine performance during cold starts, suspected to be due to a faulty cold start injector. The issue likely involves fuel delivery problems, and potential causes include injector malfunction or ignition system misfires. Diagnostic steps suggested include testing the injectors for performance metrics like spray pattern and flow rate, rather than starting with cleaning. Ultimately, the problem was confirmed to be a defective injection valve/injector, which was repaired.

Did this summary help you solve your problem?

4 comment(s)

liam_star3

Hard starting on an LFA definitely points to fuel delivery issues during cold starts. Have you considered an injector test, or checking fuel rail pressure? A misfire could also contribute, so perhaps check the ignition system as well. It's difficult to pinpoint without further diagnostics, but start with the basics.

jannikschmidt21 (community.author)

Thank you for your reply. Could you elaborate on the process of testing the injectors? Is it feasible to perform injector cleaning as an initial step, or would a full injector test be more appropriate at this stage?

liam_star3

Regarding injector testing versus cleaning, I'd lean toward a comprehensive test first. This will give you a clear picture of each injector's performance – spray pattern, flow rate, and leakage. Cleaning might improve things, but it's a bit like a shot in the dark without knowing the extent of the problem. Given the LFA's age and mileage, and the symptoms, it might be best to bring it to a trusted workshop.

jannikschmidt21 (community.author)

Understood. I appreciate your input. The issue was indeed a defective injection valve/injector. The repair cost came to 515€. Thank you again for your assistance.

rmh_community_comment_box_header

community_crosslink_scanner_headline

community_crosslink_scanner_intro

community_crosslink_scanner_title

community_crosslink_scanner_price

community_crosslink_rmh_headline

community_crosslink_rmh_intro

community_crosslink_rmh_title

community_crosslink_rmh_subtitle

community_crosslink_rmh_brand

LEXUS

community_crosslink_rmh_model

LFA